Signaling of modulation configuration

ABSTRACT

The present disclosure pertains to a terminal for a wireless network, the terminal being adapted to receive a control message. The terminal further is adapted to read from one of a set of alternative tables based on the control message, and to perform modulation configuration based on information read from the table.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. application Ser. No.15/447,941, filed Mar. 2, 2017, entitled SIGNALING OF MODULATIONCONFIGURATION, and is a continuation of U.S. patent application Ser. No.14/771,716, filed Aug. 31, 2015, which is a U.S. National StageApplication of, and claims priority to, Patent Cooperation TreatyApplication No. PCT/SE2015/050835, filed Jul. 28, 2015, and also claimspriority to U.S. Provisional Patent Application No. 62/030,239, filedJul. 29, 2014, entitled SIGNALING OF 256QAM CONFIGURATION and theentireties of all of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure pertains to methods and apparatus involved inmodulation configuration in wireless communication networks, inparticular regarding 256QAM signaling.

BACKGROUND

In 3GPP Rel-12, 256QAM is introduced as a new modulation scheme in thedownlink to increase the data rate for small cells. To support 256QAM, anew Rel-12 CQI table and a new Rel-12 MCS table including 256QAM entriesmay be used. The Re1-8 legacy CQI and MCS table may be used if 256QAMsupport is not required. Therefore, there is a need to signal theconfiguration of two sets of tables, i.e. Rel-12 CQI and MCS table orRe1-8 CQI and MCS table, between a base station or eNB and one or moreterminals or UEs, which may comprise a first set of alternative tables.Similar signaling may be needed in other contexts, e.g. if newmodulation-related tables are introduced and/or to cover a sufficientlylarge number of possible modulation configurations.

SUMMARY

In the following, solutions for 256QAM table configuration signaling areproposed, which may be considered pertaining to modulation configurationsignaling. The solutions generally may be implemented by a base stationadapted to send a control message like a RRC message and/or a terminalor UE (user equipment) adapted to receive a control message, inparticular a RRC message, and/or to configure its modulationconfiguration based on and/or according to the control message or RRCmessage and/or information provided in the control message or RRCmessage.

The information and/or the control message may comprise parameters asdisclosed herein, e.g. table indication parameters. The suggestedapproaches allow providing a large number of possible modulationconfigurations (and/or increasing the number) with a limited amount ofsignaling, and in particular in the context of LTE allow easy extensionof modulation-related tables with a low amount of changes required tothe standard and systems, while upholding legacy functionality.

There is disclosed a terminal for a wireless network, the terminal beingadapted to receive a control message. The terminal further is adapted toread from one of a set of alternative tables based on the controlmessage, and is further adapted to perform modulation configurationbased on information read from the table.

Alternatively or additionally, there is suggested a method for aterminal for a wireless network. The method comprising receiving acontrol message and reading from one of a set of alternative tablesbased on the control message, as well as performing modulationconfiguration based on information read from the table.

In addition, there is disclosed a base station for a wireless network.The base station is adapted to determine a control message and furtheris adapted to transmit the control message to a terminal. The controlmessage comprises information indicating a table of a set of alternativetables to be used.

A method for a base station for a wireless network is also proposed. Themethod comprises determining a control message and transmitting thecontrol message to a terminal. The control message comprises informationindicating a table of a set of alternative tables to be used.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically shows a user equipment or terminal.

FIG. 2 schematically shows a base station.

FIGS. 3 and 4 show methods for signal configuration in schematicflowcharts.

DETAILED DESCRIPTION

A terminal and/or base station may generally be part of a system and/orform a system, in particular a system for wireless communication. Basestation and/or terminal may be adapted according to and/or to follow atleast one wireless communication standard, in particular an LTEstandard.

In LTE systems up to Rel-11, the set of modulation scheme for bothdownlink and uplink includes QPSK, 16QAM and 64QAM, corresponding to 2,4 and 6 bits per modulation symbol respectively. In LTE evolution,especially for the scenarios with high SINR (Signal to Interference andNoise Ratio), e.g. in small cell environments with terminals close tothe serving eNB, a means to provide higher data rate with giventransmission bandwidth is the use of higher order modulation that allowsfor more bits of information to be carried per modulation symbol. Forexample, with the introduction of 256QAM, 8 bits are transmitted permodulation symbol, which can improve the peak data rate maximum by 33%.It is also noted that 256QAM may only provide gains when the SINR issufficiently high in certain scenarios.

In practice, the performance of 256QAM is highly sensitive tointerference and/or transmitter EVM (Error vector magnitude) andreceiver impairments. In 3GPP, 256QAM has been studied mainly under theumbrella of small cell enhancements. To support 256QAM, the standard maybe adapted regarding CQI/MCS/TBS table design, configuration signalingand UE category handling.

A Rel-12 CQI table and Rel-12 MCS table are introduced in 3GPP tosupport 256QAM, as shown in Table and Table 2. Re1-8 CQI table and MCStable can be found in 3GPP TS 36.213 Table 7.2.3-1 and Table 7.1.7.1-1,respectively.

In order to support 256QAM, Rel-12 CQI and MCS table may cover a largerSNR or SINR range comparing to Rel-8 tables. The CQI/MCS indexgranularity may be increased in the new table, which may affect the linkadaptation performance. The Rel-12 CQI and MCS table may coexist withlegacy Re1-8 tables, and in particular may form sets of alternativetables. A base station or eNB may be adapted to determine or decideand/or configure which set of tables to be used based on current channelcondition, UE capability and other operative conditions.

Regarding the table configuration, there may be followed the approach:

For TM10, CQI tables are common for all CSI processes and/or Rel-11subframe measurement sets and the MCS table is common for all CQI sets.In this case, a first set of alternative tables for MCS and a second setof alternative tables for CQI and/or all measurement subframe sets maybe sufficient

For TM1-9, 256QAM a CQI table may be configured per each Rel-11 subframemeasurement set. In this case, first, second and third sets ofalternative tables or second or third table accesses to a second tablemay be useful.

The CQI and MCS table configuration may be informed and/or transmitted,by the base station or eNodeB, to one or more UEs via a control message,in particular RRC message signaling.

TABLE 1 Rel-12 256QAM CQI Table CQI code rate × index modulation 1024efficiency 0 out of range 1 QPSK 78 0.1523 2 QPSK 193 0.3770 3 QPSK 4490.8770 4 16QAM 378 1.4766 5 16QAM 490 1.9141 6 16QAM 616 2.4063 7 64QAM466 2.7305 8 64QAM 567 3.3223 9 64QAM 666 3.9023 10 64QAM 772 4.5234 1164QAM 873 5.1152 12 256QAM 711 5.5547 13 256QAM 797 6.2266 14 256QAM 8856.9141 15 256QAM 948 7.4063

TABLE 2 Rel-12 256QAM MCS Table MCS Index Modulation Order TBS IndexI_(MCS) Q_(m) I_(TBS) 0 2 0 1 2 2 2 2 4 3 2 6 4 2 8 5 4 10 6 4 11 7 4 128 4 13 9 4 14 10 4 15 11 6 16 12 6 17 13 6 18 14 6 19 15 6 20 16 6 21 176 22 18 6 23 19 6 24 20 6 25 21 8 27 22 8 28 23 8 29 24 8 30 25 8 31 268 32 27 8 33 28 2 Reserved 29 4 30 6 31 8

There may be provided, for example for or by a given RAT (Radio AccessTechnology, e.g. LTE/E-Utran) a control layer between or in a basestation and one or more terminals, e.g. a RRC (Radio Resource Control)protocol layer, which may exist between or in one or more UEs and anassociated eNB, in particular for LTE/E-Utran, and handles the controlplane signaling of high layers between UE and eNB. The control layergenerally may be adapted and/or used for connectionestablishment/release, system information broadcast, radio bearerestablishment/reconfiguration/release, mobility procedure, pagingnotification/release and so on.

In particular, the control layer, e.g. RRC, may be adapted and/or usedfor signaling modulation table configuration, in particular modulationtable configuration for 256QAM, which may be referred to as 256QAM tableconfiguration. A control message may comprise corresponding parameters,in particular table indication parameters and/or indices associated torespective tables for modulation configuration.

Modulation configuration signaling, in particular for 256QAM tableconfiguration, may be provided with numerous options. From astandardization point of view, it may be advantageous to not have toomuch configurability options. Also, a significant effort may be involvedif a large amount of different combinations need to tested, which couldmake the efforts too high if too much configurability options are to bestandardized.

One possible approach for is shown in Table 3. With this approach, 3 RRCparameters are added to the list of possible RRC parameters in thespecification for 256QAM table configuration. The first parameter“MCS/CQI table configuration for serving cell c” is used for configuringthe MCS/CQI table in general. The second and third parameters are usedfor CQI table configuration when measurement subframe sets areconfigured for TM1-9. With this approach, when measurement subframe setsare configured for TM1-9, the MCS table needs to be signaled to UE usingthe first parameter. Therefore, 3 parameters need to be signaled. Inaddition, it has a limitation that two measurement subframe set shoulduse the same MCS table.

It may be considered to separate the configurability of MCS and CQItable. This approach will introduce even more RRC parameters.

TABLE 3 An example of RRC configuration of CQI/MCS table Parameter namein Parameter name in specification text Description MCS/CQI tableMCS/CQI table Configures which MCS/CQI table is configuration forserving configuration for used between (7.1.7.1-1: Modulation cell cserving cell c and TBS index table for PDSCH, 7.2.3-1: 4-bit CQI Table)and the MCS/CQI tables for 256QAM. In TM1-9, the 256QAM CQI table foreach subframe set is configured by parameter ″CQI table configurationfor csi-MeasSubframeSetx-r10 of serving cell c″ instead if Rel-11subframe set is configured. CQI table configuration CQI table Forcsi-MeasSubframeSet1-r10 of for csi- configuration for csi- serving cellc, when TM1-9 is MeasSubframeSet1-r10 MeasSubframeSet1- configured,configures which CQI of serving cell c r10 of serving cell c table isused between (7.1.7.1-1: Modulation and TBS index table for PDSCH,7.2.3-1: 4-bit CQI Table) and the CQI tables for 256QAM. CQI tableconfiguration CQI table For csi-MeasSubframeSet2-r10 of for csi-configuration for csi- serving cell c, when TM1-9 isMeasSubframeSet2-r10 MeasSubframeSet2- configured, configures which CQIof serving cell c r10 of serving cell c table is used between(7.1.7.1-1: Modulation and TBS index table for PDSCH, 7.2.3-1: 4-bit CQITable) and the CQI tables for 256QAM.

Control message parameters, e.g., RRC parameters, and signaling tosupport for example the 256QAM CQI and MCS table configuration areproposed, aiming at using as few control message or RRC parameters aspossible.

There is disclosed a terminal for a wireless network, the terminal maybe adapted to, and/or comprise a corresponding unit adapted to, receivea control message, e.g. from a network and/or base station, which may bean eNodeB. The terminal further may further be adapted to, and/or maycomprise a corresponding unit adapted to, read from one of a set ofalternative tables based on the control message.

Furthermore, the terminal may be adapted to, and/or comprise acorresponding unit adapted to, perform modulation configuration and/ormodulation based on information read from the table. This keeps the sizeof tables limited and in particular allows keeping an already defined(e.g. by a standard like LTE) table unchanged, while introducing newpossibilities for modulation with an alternative table.

The set of alternative tables may generally refer to differentmodulation schemes, wherein each table may refer to different modulationschemes and/or different tables of a set may have differences pertainingto their modulation schemes. One of the schemes may be the scheme to beused, e.g. by the terminal, in particular for performing modulationconfiguration and/or modulation.

It may be considered that the control message comprises a parameterconfiguring a MCS table for both of two measurement subframe sets and atthe same time configuring a CQI table for one of the measurementsubframe set. Information read from the table may comprise and/orindicate a modulation configuration and/or modulation scheme to be used.

The terminal may generally be adapted for operating with a 256QAM MCStable, if a first or second measurement set is configured with a 256QAMCQI table. Accordingly, 256QAM may be easily introduced e.g. into LTEand with a very limited amount of required signaling to configure aterminal accordingly.

Moreover, there is disclosed a method for a terminal for a wirelessnetwork. The terminal may be a terminal as described herein. The methodmay comprise receiving a control message as well as reading from one ofa set of alternative tables based on the control message. The method mayfurther comprise performing modulation configuration based oninformation read from the table and/or modulation based on informationread from the table.

The set of alternative tables may generally refer to differentmodulation schemes, wherein each table may refer to different modulationschemes and/or different tables of a set may have differences pertainingto their modulation schemes. One of the schemes may be the scheme to beused, e.g. by the terminal, in particular for performing modulationconfiguration and/or modulation.

It may be considered that the control message comprises a parameterconfiguring a MCS table for both of two measurement subframe sets and atthe same time configuring a CQI table for one of the measurementsubframe set. Information read from the table may comprise and/orindicate a modulation configuration and/or modulation scheme to be used.

The method may further comprise operating with a 256QAM MCS table, if afirst or second measurement set is configured with a 256QAM CQI table.

A base station for a wireless network is disclosed, wherein the basestation may be adapted to, and/or comprise a corresponding unit adaptedto, determine a control message. The base station further may be adaptedto, and/or comprise a corresponding unit adapted to, transmit thecontrol message to a terminal. The terminal may be any of the terminalsdisclosed herein. The control message may comprise informationindicating a table of a set of alternative tables to be used, e.g. bythe terminal, in particular for performing modulation configurationand/or modulation.

The set of alternative tables may generally refer to differentmodulation schemes, wherein each table may refer to different modulationschemes and/or different tables of a set may have differences pertainingto their modulation schemes. One of the schemes may be the scheme to beused, e.g. by the terminal, in particular for performing modulationconfiguration and/or modulation.

It may be considered that the control message comprises a parameterconfiguring a MCS table for both of two measurement subframe sets and atthe same time configuring a CQI table for one of the measurementsubframe set. Information read from the table may comprise and/orindicate a modulation configuration and/or modulation scheme to be used.

The control message may be adapted to configure the terminal foroperating with a 256QAM MCS table, if a first or second measurement setis configured with a 256QAM CQI table.

Moreover, there is described a method for a base station for a wirelessnetwork. The base station may be any of the base stations describedherein. The method may comprise determining a control message andtransmitting the control message to a terminal. The control message maycomprise information indicating a table of a set of alternative tablesto be used, e.g. by the terminal, in particular for performingmodulation configuration and/or modulation.

The set of alternative tables may generally refer to differentmodulation schemes, wherein each table may refer to different modulationschemes and/or different tables of a set may have differences pertainingto their modulation schemes. One of the schemes may be the scheme to beused, e.g. by the terminal, in particular for performing modulationconfiguration and/or modulation.

It may be considered that the control message comprises a parameterconfiguring a MCS table for both of two measurement subframe sets and atthe same time configuring a CQI table for one of the measurementsubframe set. Information read from the table may comprise and/orindicate a modulation configuration and/or modulation scheme to be used.

The control message may be adapted for configuring the terminal foroperating with a 256QAM MCS table, if a first or second measurement setis configured with a 256QAM CQI table.

Generally, the control message may comprise one parameter, which may bea single or common or specific parameter, for configuring the terminalfor operating with a 256QAM MCS table and at the same time configuringone of the first or second measurement sets in the context of 256QAM CQIdiscussed herein.

In some variants, the non-limiting term UE or terminal is used. The UEor terminal herein can be any type of wireless device or terminalcapable of communicating with a network node or another UE over radiosignals, in particular an end-user device. The UE may also be radiocommunication device, target device, device to device (D2D) UE, machinetype UE or UE capable of machine to machine communication (M2M), asensor equipped with UE and/or radio communication capabilities, iPAD,Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE),laptop mounted equipment (LME), USB dongles, Customer Premises Equipment(CPE) etc. Any device providing a terminal-like functionality orimpression to another network node, which may generally be a terminaland/or a base station, may be considered as a terminal or UE. This mayfor example be the case for a relay node, which may provide aterminal-like behavior. A UE or terminal may be adapted to comply withan LTE standard.

In the context of this disclosure, the term eNB or base station may beused. A base station or eNB may be any kind of network node, which maybe adapted to communicate with a UE or terminal, in particular via awireless connection and/or radio connection. Such a base station or eNBmay refer to or comprise a base station, radio base station, evolvedNode B (eNB), Node B, relay node, access point, radio access point,Remote Radio Unit (RRU), Remote Radio Head (RRH) etc. In particular, abase station may be any device adapted to transmit a control message,e.g., a RRC message, to a terminal or UE. An eNB may be considered as aspecific example of a base station. An eNB may be adapted to comply withan LTE standard.

The embodiments are described by considering LTE. However theembodiments are applicable to any RAT or multi-RAT systems, where the UEregularly assess the serving cell performance by the virtue of RLMprocedure (or equivalent procedures) e.g. LTE FDD/TDD, WCDMA/HSPA,GSM/GERAN, Wi Fi, CDMA2000 etc. It should be noted that LTE orLTE-Advanced terminology may sometimes be used throughout thisdescription, however the concepts described herein are not limited toLTE or LTE-Advanced. Rather, the concepts disclosed herein areapplicable to any suitable type of cellular communications network,which may comprise one or more terminals and/or one or more basestations.

The embodiments are described for a single carrier (aka single carrieroperation of the UE) in a network node. However the embodiments areapplicable for multi-carrier or carrier aggregation operation i.e. whennetwork node transmits plurality of carriers to the same or differentUEs. The embodiments shall apply to each carrier in this case.

In the following, configuring a table may refer to indicating whichtable to use.

The embodiments are described only for 256QAM. However, any higher ordermodulation schemes which require new tables are applicable. In theembodiments, the configurable tables are, but not limited to, CQI tableand MCS table. The table number mention below refers to 3GPP TS36.213.

It is suggested to define 3 control message or RRC parameters, as showne.g. in Table 4, wherein the number of parameters actually used dependson the situation. When the UE is using TM10 or TM1-9 configured withoutCSI measurement subframe set, the first parameter in the table (i.e.MCS/CQI table configuration for serving cell c), representing a firsttable indication parameter, indicates whether or not the UE is intendedto use CSI and MCS table for 256QAM for a specific set of DCI formats,RNTIs and search spaces on (E)PDCCH and/or indicates which correspondingtable to use.

However, when measurement subframe set is configured for TM1-9, the CQItable for each subframe set is configured by the second and third tableindication parameters “CQI table configuration forcsi-MeasSubframeSetx-r10 of serving cell c” and Rel-12 256QAM MCS tableshall be used when Rel-12 256QAM CQI table is configured for any of thesubframe sets, which may be considered to provide a pre-determineddefault.

To clarify this further in case either the first or second measurementset is configured with the 256QAM CQI table, the UE will operate withthe 256QAM MCS table for a given set of DCI formats, RNTIs and searchspaces on (E)PDCCH for all subframe sets. The DCI formats using 256QAMmay be limited to only DCI formats 1, 1b, 1d, 2, 2a, 2b, 2c, 2d and onlywhen these are scrambled with the C-RNTI. It is further given that incase there are more than two measurement sets the same approach can beoperated as well. In this example, all the 3 parameters are defined asOPTIONAL.

Only the second and third parameters may be signaled when measurementsubframe set is configured in TM1-9, and only the first parameter may besignaled for the other cases. Accordingly, the number of tableindication parameters is variable and may be one or two. Thisalternative is captured in

Table 5.

An alternative version of embodiment 1 is that when the UE is using TM10or TM1-9 configured without CSI measurement subframe set, the firstparameter in the table (i.e. MCS/CQI table configuration for servingcell c) gives whether or not the UE is using CSI and MCS table for256QAM for a specific set of DCI formats, RNTIs and search spaces on(E)PDCCH.

If the UE is configured with measurement subframe sets for TM1-9, theparameter in the first row only gives which MCS table that should beused for both measurement subframe sets. It is then further possible toconfigure for each measurement subframe set separately which CQI tablethat should be used i.e. either the legacy CQI table or the CQI tableconsidering 256QAM usage. In this example, the three parameters aresignaled when measurement subframe set is configured in TM1-9, and onlythe first parameter is signaled for the other cases. This alternative iscaptured in Table 4.

TABLE 4 Embodiment 1 RRC configuration parameters (alternative 2)Parameter name in Parameter name in specification text DescriptionMCS/CQI table MCS/CQI table Configures which MCS/CQI table is usedconfiguration for serving configuration for between (7.1.7.1-1:Modulation and TBS index cell c serving cell c table for PDSCH, 7.2.3-1:4-bit CQI Table) and the MCS/CQI tables for 256QAM for TM10 and TM1-9when measurement subframe sets are not configured. In TM1-9, the CQItable for each subframe set is configured by parameter ″CQI tableconfiguration for csi-MeasSubframeSetx-r10 of serving cell c″ instead ifRel-11 subframe set is configured. This parameter then instead indicatesonly the MCS table that shall be used for both subframe sets. CQI tableconfiguration CQI table For csi-MeasSubframeSet1-r10 of serving cell c,for csi- configuration for csi- when TM1-9 is configured, configureswhich MeasSubframeSet1-r10 MeasSubframeSet1- CQI table is used between(7.2.3-1: 4-bit CQI of serving cell c r10 of serving cell c Table) andthe CQI tables for 256QAM. CQI table configuration CQI table Forcsi-MeasSubframeSet2-r10 of serving cell c, for csi- configuration forcsi- when TM1-9 is configured, configures which MeasSubframeSet2-r10MeasSubframeSet2- CQI table is used between (7.2.3-1: 4-bit CQI ofserving cell c r10 of serving cell c Table) and the CQI tables for256QAM.

TABLE 5 Embodiment 1 RRC configuration parameters (alternative 1)Parameter name in Parameter name in specification text DescriptionMCS/CQI table MCS/CQI table Configures which MCS/CQI table is usedconfiguration for serving configuration for between (7.1.7.1-1:Modulation and TBS index cell c serving cell c table for PDSCH, 7.2.3-1:4-bit CQI Table) and the MCS/CQI tables for 256QAM for TM10 and TM1-9when measurement subframe sets are not configured. MCS/CQI table MCS/CQItable For csi-MeasSubframeSet1-r10 of serving cell c, configuration forcsi- configuration for csi- when TM1-9 is configured, configures whichMeasSubframeSet1-r10 MeasSubframeSet1- CQI table is used. If either csi-of serving cell c r10 of serving cell c MeasSubframeSet1-r10 or csi-MeasSubframeSet2-r10 is configured with the 256QAM CQI table the UE isconfigured to use the MCS table corresponding to 256QAM (for certain DCIformats, RNTIs and search spaces) for all the subframes. MCS/CQI tableMCS/CQI table For csi-MeasSubframeSet2-r10 of serving cell c,configuration for csi- configuration for csi- when TM1-9 is configured,configures which MeasSubframeSet2-r10 MeasSubframeSet2- CQI table isused. If either csi- of serving cell c r10 of serving cell cMeasSubframeSet1-r10 or csi- MeasSubframeSet2-r10 is configured with the256QAM CQI table the UE is configured to use the MCS table correspondingto 256QAM (for certain DCI formats, RNTIs and search spaces) for all thesubframes.

In embodiment 2, only 2 RRC parameters are defined as shown in Table 6.The first parameter “MCS/CQI table configuration for serving cell c” isused for general MCS/CQI table configuration in TM10 and TM1-9 withoutconfiguration of measurement subframe set for the UE, providing a firsttable indication parameter referring to a first set of alternativetables. When measurement subframe set is configured for TM1-9, the firstparameter is used to configure the CQI table forcsi-MeasSubframeSet1-r10 and the second parameter “CQI tableconfiguration for csi-MeasSubframeSet2-r10 of serving cell c” configuresCQI table for csi-MeasSubframeSet2-r10.

Accordingly, second and third table indication parameters may be used,whereas as a pre-determined default is assumed regarding the first setof alternative tables referring to the general MCS/CQI table. In thisexample, all the parameters are defined as OPTIONAL. Two parameters aresignaled when measurement subframe set is configured in TM1-9, theparameters referring to second and third tables, and only the firstparameter is signaled for the other cases, referring to a first table.

Similar to embodiment 1, there are a few examples given here how MCStable is determined when measurement subframe sets are configured inTM1-9.

In a first example the MCS table to apply for a specific set of DCIformats, RNTIs and (E)PDCCH search spaces are given by the configurationof the first parameter, i.e. the parameter “MCS/CQI table configurationfor serving cell c”. The MCS table configuration is applied for allsubframes, i.e. not dependent on which measurement subframe set theybelong to. However the CQI table to be used is separately configured permeasurement subframe set.

In a second example the UE would use the 256QAM MCS table for a specificset of DCI formats, RNTIs and (E)PDCCH search spaces are if either thefirst or second parameter is configured with the 256QAM CQI table. Ifboth parameters are configured with legacy CQI table then the legacy MCStable is used. The MCS table configuration is applied for all subframes,i.e. not dependent on which measurement subframe set they belong to.However the CQI table to be used is separately configured permeasurement subframe set.

In a third example the UE would use the 256QAM MCS table for thesubframes belong to a specific measurement subframe set and for aspecific set of DCI formats, RNTIs and (E)PDCCH search spaces if the256QAM CQI table is configured for that measurement subframe set.

All the three alternatives are shown in the below tables

TABLE 6 Embodiment 2 RRC configuration parameters (alternative 1)Parameter name in Parameter name in specification text DescriptionMCS/CQI table MCS/CQI table Configures which MCS/CQI table is usedconfiguration for serving configuration for between (7.1.7.1-1:Modulation and TBS index cell c serving cell c table for PDSCH, 7.2.3-1:4-bit CQI Table) and the MCS/CQI tables for 256QAM for TM10 and TM1-9when measurement subframe sets are not configured. If measurementsubframe sets are configured in TM1-9. The parameter gives the CQI tableto apply for the first measurement subframe set and it further indicatesMCS table to apply for the subframes belonging to the first and secondmeasurement subframe set. CQI table configuration CQI table Theparameter indicates whether or not to use the for csi- configuration forcsi- 256QAM CQI table or the legacy CQI table for MeasSubframeSet2-r10MeasSubframeSet2- serving cell c and TM1-9 for the second of servingcell c r10 of serving cell c measurement subframe set, i.e. csi-MeasSubframeSet2-r10.

TABLE 7 Embodiment 2 RRC configuration parameters (alternative 2)Parameter name in Parameter name in specification text DescriptionMCS/CQI table MCS/CQI table Configures which MCS/CQI table is usedconfiguration for serving configuration for between (7.1.7.1-1:Modulation and TBS index cell c serving cell c table for PDSCH, 7.2.3-1:4-bit CQI Table) and the MCS/CQI tables for 256QAM for TM10 and TM1-9when measurement subframe sets are not configured. If measurementsubframe sets are configured in TM1-9, the parameter gives the CQI tableto apply for the first measurement subframe set. If either the first orsecond measurement subframe set is configured with the 256QAM CQI tablethe UE will use the 256QAM MCS table for all subframes for specific DCIformats, RNTIs and (E)PDCCH search spaces. CQI table configuration CQItable The parameter indicates whether or not to use the for csi-configuration for csi- 256QAM CQI table or the legacy CQI table forMeasSubframeSet2-r10 MeasSubframeSet2- serving cell c in TM1-9 for thesecond of serving cell c r10 of serving cell c measurement subframe set,i.e. csi- MeasSubframeSet2-r10. If either the first or secondmeasurement subframe set is configured with the 256QAM CQI table the UEwill use the 256QAM MCS table for all subframes for specific DCIformats, RNTIs and (E)PDCCH search spaces.

TABLE 8 Embodiment 2 RRC configuration parameters (alternative 3)Parameter name in Parameter name in specification text DescriptionMCS/CQI table MCS/CQI table Configures which MCS/CQI table is usedconfiguration for serving configuration for between (7.1.7.1-1:Modulation and TBS index cell c serving cell c table for PDSCH, 7.2.3-1:4-bit CQI Table) and the MCS/CQI tables for 256QAM for TM10 and TM1-9when measurement subframe sets are not configured. If measurementsubframe sets are configured in TM1-9, the parameter gives the CQI/MCStable to apply for the first measurement subframe set. If the 256QAMMCS/CQI table is configured, 256QAM MCS table is only used for thesubframe belonging to the first measurement subframe set and forspecific DCI formats, RNTIs and (E)PDCCH search spaces. CQI tableconfiguration MCS/CQI table The parameter indicates whether or not touse the for csi- configuration for csi- 256QAM CQI table or the legacyCQI table for MeasSubframeSet2-r10 MeasSubframeSet2- serving cell c andTM1-9 for the second of serving cell c r10 of serving cell c measurementsubframe set, i.e. csi- MeasSubframeSet2-r10. If measurement subframesets are configured in TM1-9. The parameter gives the CQI/MCS table toapply for the second measurement subframe set. If the 256QAM MCS/CQItable is configured, 256QAM MCS table is only used for the subframebelonging to the second measurement subframe set and for specific DCIformats, RNTIs and (E)PDCCH search spaces.

For both embodiments 1 and 2 it is given that if a specific parameterconfigures MCS table for both measurement subframe sets and at the sametime configures the CQI table for one of the measurement subframe set.This measurement subframe set can be either measurement subframe set 1or 2. It is further given that each parameter listed below can be aunique parameter per serving cell or be valid across serving cells.

There is generally described a terminal or UE for a wirelesscommunication network. The terminal or UE may be adapted to be able toaccess and/or store one or more tables. A terminal or user equipment maygenerally be adapted for receiving a control message, in particular aRRC, for example in the context of LTE/E-UTRAN. A terminal or userequipment (UE) may generally be a device configured for wirelessdevice-to-device communication and/or a terminal for a wireless and/orcellular network, in particular a mobile terminal, for example a mobilephone, smart phone, tablet, PDA, etc. It may be considered that aterminal or user equipment comprises radio circuitry and/controlcircuitry for wireless communication. Radio circuitry may comprise forexample a receiver device and/or transmitter device and/or transceiverdevice.

Control circuitry may include a controller, which may comprise amicroprocessor and/or microcontroller and/or FPGA (Field-ProgrammableGate Array) device and/or ASIC (Application-Specific Integrated Circuit)device. It may be considered that control circuitry comprises or may beconnected or connectable to memory, which may be adapted to beaccessible for reading and/or writing by the controller and/or controlcircuitry. It may be considered that a user equipment is configured tobe a user equipment adapted for LTE/E-UTRAN. Control circuitry may beadapted to extract, from a received control message, one or more tableindication parameters and/or to choose and/or access and/or read atleast one table of at least one set of tables, in particular based onthe one or more table indication parameters. Radio circuitry and/orcontrol circuitry may be adapted to receive a control message.

A table may be stored in a memory of the terminal or UE, which may beaccessible, in particular for reading, for control circuitry or acontroller of the terminal or UE. A table may generally indicateinformation regarding modulation and/or a configuration for a mode, inparticular a transmission mode and/or reception mode of the terminal. Itmay be envisioned that a table is indexed such that an index is linkedor associated to an indication or parameter referring an aspect of themode, for example to modulation and/or configuration for the mode, inparticular regarding parameters pertaining to channel quality parametersand/or their transmission, in particular to a base station. It may beenvisioned that the terminal or UE is adapted to access and/or storedifferent alternative tables regarding at least one common or sameaspect or the same aspects of modulation or configuration of a mode. Thealternative tables may have the same size and/or number of indexedfields or may be implemented such that they have different sizes and/ornumbers of indexed fields. An aspect may refer to the modulation schemeto be used, for example different variants of QAM. A corresponding tablemay be implemented as MCS table.

Alternative tables of this aspect may differ regarding their granularityand/or the different variants of modulation indexed and/or to be used orusable. For example, an alternative second table may include QAM withhigher points and/or larger bit rate than a first table. Another aspectmay refer to channel quality information and/or setup for transmissionof related information and/or parameters. For example, this aspect mayrefer to CSI and/or a measurement subframe set and/or its setup.

A table may generally be stored in a memory accessible and/or accessedby the terminal or UE or an associated control circuitry or controller,in particular for read access and/or reading or retrieving a parameterand/or table entry, in particular based on an index. An index forreading or retrieving may be obtainable and/or receivable by theterminal or UE and/or associated control circuitry from a memory and/orby receiving a message, for example a control message.

A terminal or user equipment generally may comprise and/or store and/orbe adapted to access at least one set of at least two alternativetables; each table in a set of table may be related to at least onecommon aspect and/or the same aspect. A set of alternative tables mayfor example comprise one table related to legacy or earlier standardversion of a table, and a table related to a later standard version.

It may be considered that a first set of tables comprises at least twotables comprising differently indexed and/or different modulationschemes and/or different MCS tables. There may be provided a second setof tables, which may comprise different tables regarding CQI, inparticular a first measurement subframe set, e.g. as indicated abovewith regards to LTE. There may be provided a third set of tables, whichmay comprise different tables regarding a different CQI aspect, inparticular a second measurement subframe set, e.g. as indicated abovewith regards to LTE. Generally, a provided set of tables may be storedin a memory of the terminal or UE and/or accessible to or accessed by aterminal or UE. A terminal or UE may be adapted to receive a controlmessage, in particular from a base station or eNB, and/or to extract,from a control message, one or more table indication parameters. It maybe conceived that the terminal or UE is adapted to choose and/ordetermine, from one or more sets of alternative tables, based on thecontrol message and/or the table indication parameter or parameters,which table or tables from the one or more set of alternative tables toaccess and/or to read.

Alternatively or additionally, it may be adapted to access and/or readfrom at least one table, in particular one of a set of alternativetables and/or more than one table, each table being one of a table in aset of alternative tables, based on the control message and/or at leastone table indication parameter of the control message, which maycomprise an indication and/or information and/or one or more parametersindicating at least one table to be used from at least one set ofalternative tables and/or index parameters allowing accessing and/orreading and/or indexing the respective table. The terminal or UE may beadapted to perform a modulation configuration based on the table and/orbased on information retrieved or read from the table.

A control message may generally be a message receivable or received by aterminal or user equipment, e.g. from a base station, and/ortransmittable or transmitted by a base station, e.g. to a userequipment. The control message may generally comprise information and/orone or more parameters for controlling a user equipment, in particularinformation and/or one or more parameters indicating a table of a set ofat least two alternative tables to be used, in particular by the userequipment. The parameters may include one or more table indicationparameters, for example bit-value parameters. The value of a tableindication parameter may generally indicate which table the terminal oruser equipment is supposed to use. The number of table indicationparameters may be variable and/or dependent on the tables to be usedand/or the transmission modes and/or modulation scheme to be used.

Generally, there may be a table indication parameter associated to eachset of alternative tables. The table indication parameter may be adaptedto be able to indicate, in particular to indicate unambiguously, whichtable of a set to use, in particular in regards to it bit-size. Forexample, if a set of tables comprises two tables, a 1-bit parameter maybe sufficient. Generally, the control message and/or the number of tableindication parameters and/or their respective values may be determinedand/or configured and/or provided and/or transmitted by a base station.Determining the control message and/or the number of table indicationparameters and/or their respective values may be performed by a controlmessage determination unit or device. The control message may includeone or more parameters indicating an indexed item or information toretrieve from one or more tables to be read from. Transmitting thecontrol message may be performed by a transmission unit or device.Control message determination unit or device and/or transmission unit ordevice may be implemented in and/or on a base station, e.g. in softwareand/or hardware and/or firmware, in particular utilizing controlcircuitry and/or a memory of the base station.

In one general variant, the control message may comprise a first tableindication parameter indicating a table from a first set of alternativetables, in particular alternative MCS tables. In the first mode, thecontrol message may comprise only one table indication parameter and/ormerely an MCS table indication parameter and/or the number of tableindication parameters may be one. Other tables may be accessed or notaccessed according to a pre-defined default. Depending on thetransmission mode and/or the modulation scheme used and/or depending onwhether and/or which CSI scheme or measurement subframe set setup is tobe used, the control message, in a second mode, may comprise a secondtable indication parameter or a second and a third table indicationparameter.

It may be contemplated that, e.g. to indicate that the same CSI schemeand/or measurement subframe set setup is to be used for each of twomeasurement subframe sets, the control message may comprise the firsttable indication parameter and a second table indication parameter,wherein the second table indication parameter may indicate a secondand/or third table to be used and/or being associated to respectivetables, for example second and third tables as outlined above. This maybe in the context of a second mode, wherein the number of tableindication parameters may be two.

As an alternative, there may be provided two parameters including a thesecond table indication parameter and a third table indicationparameter, which may refer to a second set of alternative tables,respectively configurations of two aspects, e.g. two measurementsubframe sets, and/or associated table accesses to the same table,and/or a second set of alternative tables and a third set of alternativetables. In this case, the terminal may assume a default configurationregarding the first set of alternative tables, e.g. regarding MCSconfiguration. The two measurement subframe sets may be configured orset up based on the two table indication parameters pertaining to thesecond set of tables, if the subframe sets use the same set of tables,and/or the second and third set of tables, if the different subframesets use different sets of tables.

The second table may in one example be used for both measurementsubframe sets, instead of using a second and a third table; thus, thesecond table indication parameter may indicate a second table access,and optionally, a third table access—which may or may not be performed,as it may be more efficient to access the second table only once and usethe value retrieved for both subframe sets. In such an example of thesecond mode, the control message may comprise exactly two tableindication parameters.

In a different example of a second mode, or in a third mode in additionto the above second mode, e.g. if different setups are to be used forCSI and/or two measurement subframe sets, the control message maycomprise, next to a first table indication parameter, a second tableindication parameter and a third table indication parameter, wherein thesecond table indication parameter may be associated to a second tableand the third table indication parameter may be associated to a thirdtable, e.g. the second and third tables discussed above. In these modes,the number of table indication parameters may be three. This may be usedas a second mode even for cases in which the second and third tables areused identically, to provide a simple control message configuration anddefinition and/or to more clearly distinguish the different modes by thenumber of parameters used.

In a second variant, the control message, in a first mode, may comprisea first table indication parameter associated to a first set ofalternative tables, e.g. related to MCS. The number of table indicationparameters in this mode may be one. In a second mode, there may beprovided, instead of a first table indication parameter, a second tableindication parameter and a third table indication parameter associatedto a second set of alternative tables and a third set of alternativetables. The first set of alternative tables may be accessed and/or usedor not used according to a pre-defined default. In this second mode, thenumber of table indication parameters may be two. This variant allowssomething similar to a variable overload, as the interpretation of a bitrepresenting a first table indication parameter in the first mode wouldchange in the second mode.

The control message may be adapted according to the first variant(embodiment 1 above may be considered an example of this variant, e.g.tables 4 and 5 and related text) or the second variant (embodiment 2above may be considered an example of this variant, see e.g. tables 6 to8 and related text).

According to an independent variant, the control message may comprisetable indication parameters as discussed regarding embodiment 1 or 2, inparticular as disclosed in the corresponding tables.

Generally, instead of having two sets of tables for related information,e.g. measurement subframe set setup, it may be contemplated to only useone set of tables and perform one access or two accesses to the table,e.g. to set up the measurement subframe sets if they are to beconfigured in the same way, or two accesses to the same table, e.g. toset up the measurement subframe sets if they are to be configureddifferently.

Signaling configuration information may generally comprise sendingand/or receiving and/or determining a control message as outlinedherein. Performing modulation configuration may generally refer tosetting a terminal into a mode in which it used the modulation modeconfigured, in particular in regards to the type of QAM used and/ormeasurement subframe sets.

There may be envisioned a base station adapted to transmit, inparticular to a terminal or user equipment, a control message, e.g. aRRC message. It may be considered that the base station is adapted todetermine the control message and/or the number of table indicationparameters and/or at least one table indication parameter and/or anassociated value to be included into the message and/or to betransmitted, e.g. based on transmission mode to be used by the terminal,e.g. transmission mode TM10 or TM 1-9 and/or related measurementsubframe sets, and/or characteristics of transmission and/or receptionand/or operative characteristics of the communication with the terminalor UE, e.g. channel quality information. The base station may be adaptedto include, into the control message, one or more than one tableindication parameters, which may be part of determining the controlmessage. The base station may comprise any one or any combination offeatures described herein.

There may be envisioned a terminal being adapted to receive, inparticular from a base station, a control message. The terminal may beadapted to choose and/or read from and/or access at least one table ofat least one set of alternative tables based on the control message. Itmay be considered that the terminal is adapted to perform modulationconfiguration based on information and/or at least on parameterretrieved and/or read from the at least one table. The terminal maycomprise any one or any combination of features as discussed herein. Aterminal or UE may be adapted to receive the control message and/or todetermine the mode of the control message and/or the number of tableindication parameters to be expected, e.g. based on one or moreparameters of the control message and/or separate signaling and/or thelength of the control message and/or the number of parameters, inparticular of table indication parameters, in the control message. Themode of the control message may refer to the modes of the differentvariants of control messages discussed above.

There may be considered a method, in particular in a wirelesscommunication network, for signaling modulation configuration. Themethod may comprise determining and/or transmitting, in particular by abase station, which may be part of the network, a control message, inparticular a control message as discussed herein.

The control message may be received, e.g., by a terminal and/or areception unit or device. At least one table of at least one set ofalternative tables may be read from and/or accessed based on the controlmessage and/or one or more table indication parameters included therein,e.g. by the terminal and/or a reading or accessing unit. The controlmessage may be evaluated, e.g. by an evaluation unit or device, todetermine which table to read from and/or to retrieve an indexedparameter or information from the at least one table. Optionally,signaling configuration, e.g. of the terminal, may be performed based oninformation retrieved from the at least one table, e.g. by aconfiguration device or unit.

There may be considered a method for signaling modulation configuration,which may be performed by a base station. The method may comprisedetermining and/or transmitting, in particular by a base station, whichmay be part of a wireless communication network, a control message, inparticular a control message as discussed herein. The control messagemay be transmitted to a terminal.

There may also be considered a method for signaling modulationconfiguration, which may be performed by a terminal. A control messagemay be received, e.g., by a terminal and/or a reception unit or device.At least one table of at least one set of alternative tables may be readfrom and/or accessed based on the control message and/or one or moretable indication parameters included therein, e.g. by the terminaland/or a reading or accessing unit. The control message may beevaluated, e.g. by an evaluation unit or device, to determine whichtable to read from and/or to retrieve an indexed parameter orinformation from the at least one table. Optionally, signalingconfiguration, e.g. of the terminal, may be performed based oninformation retrieved from the at least one table, e.g. by aconfiguration device or unit.

A reception unit or device and/or evaluation unit or device and/orreading or accessing unit or device and/or configuration device or unitmay be implemented in or on a terminal, e.g. in software and/or hardwareand/or firmware, in particular utilizing control circuitry and/or amemory of the terminal.

In the context of this specification, wireless communication may becommunication, in particular transmission and/or reception of data, viaelectromagnetic waves, in particular radio waves, e.g. utilizing a radioaccess technology (RAT). The communication may be between members ornodes of a wireless communication network. A communication may generallyinvolve transmitting and/or receiving messages, in particular in theform of packet data. A message or packet may comprise control and/orconfiguration data and/or payload data and/or represent and/or comprisea batch of physical layer transmissions. Control and/or configurationdata may refer to data pertaining to the process of communication and/ornodes of the communication. It may, e.g., include address data referringto a node of the communication and/or data pertaining to thetransmission mode and/or spectral configuration and/or frequency and/orcoding and/or timing and/or bandwidth as data pertaining to the processof communication or transmission, e.g. in a header.

Each node involved in communication may comprise radio circuitry and/orcontrol circuitry and/or antenna circuitry, which may be arranged toutilize and/or implement one or more than one radio access technologies.Radio circuitry of a node may generally be adapted for the transmissionand/or reception of radio waves, and in particular may comprise acorresponding transmitter and/or receiver and/or transceiver, which maybe connected or connectable to antenna circuitry and/or controlcircuitry. Control circuitry of a node may comprise a controller orprocessing arrangement and/or memory arranged to be accessible for thecontroller for read and/or write access. The controller may be arrangedto control the communication and/or the radio circuitry and/or provideadditional services. Circuitry of a node, in particular controlcircuitry, e.g. a controller, may be programmed to provide thefunctionality described herein. A corresponding program code may bestored in an associated memory and/or storage medium and/or be hardwiredand/or provided as firmware and/or software and/or in hardware. Acontroller may generally comprise a processor and/or microprocessorand/or microcontroller and/or FPGA (Field-Programmable Gate Array)device and/or ASIC (Application-Specific Integrated Circuit) device.

More specifically, it may be considered that control circuitry comprisesor may be connected or connectable to memory, which may be adapted to beaccessible for reading and/or writing by the controller and/or controlcircuitry. Radio access technology may generally comprise GERAN and/orUTRAN and/or in particular E-UTRAN and/or LTE. A communication may inparticular comprise a physical layer (PHY) transmission and/orreception, onto which logical channels and/or logical transmissionand/or receptions may be imprinted or layered.

A base station may be any kind of base station of a wireless and/orcellular network adapted to serve one or more user equipments. A basestation may be adapted to provide and/or define one or more cells of thenetwork. It may be considered that a base station comprises radiocircuitry and/control circuitry for wireless communication. Controlcircuitry may be adapted to determine a control message and/or thenumber and/or values of table indication parameters; control and/orradio circuitry may be adapted for transmitting in particular thecontrol message. Radio circuitry may comprise for example a receiverdevice and/or transmitter device and/or transceiver device.

Control circuitry may include a controller, which may comprise amicroprocessor and/or microcontroller and/or FPGA (Field-ProgrammableGate Array) device and/or ASIC (Application-Specific Integrated Circuit)device. It may be considered that control circuitry comprises or may beconnected or connectable to memory, which may be adapted to beaccessible for reading and/or writing by the controller and/or controlcircuitry. A base station may be arranged to be a node of a wirelesscommunication network, in particular configured for and/or to enableand/or to facilitate and/or to participate in wireless communication.

Generally, a base station may be arranged to communicate with a corenetwork and/or to provide services and/or control to one or more userequipments and/or to relay and/or transport communications and/or databetween one or more user equipments and a core network and/or anotherbase station. An eNodeB (eNB) may be envisioned as a base station, inparticular as a base station according to LTE. It may be considered thata base station such as an eNB is configured as or connected orconnectable to an Evolved Packet Core (EPC) and/or to provide and/orconnect to corresponding functionality. The functionality and/ormultiple different functions of a base station may be distributed overone or more different devices and/or physical locations. A base stationmay be considered to be a node of a wireless communication network.

A storage medium may be any kind of medium suitable to storeinstructions readable by control circuitry, e.g. a random-access memoryand/or flash memory and/or non-volatile memory and/or optical storagemedium like a CD or DVD and/or hard disk.

Some Abbreviations used are:

-   QAM Quadrature Amplitude Modulation, a modulation scheme-   3GPP 3rd Generation Partnership Project-   CQI Channel Quality Indication-   CSI Channel State Information-   MCS Modulation and Coding Scheme; indicated by a corresponding table    (see table 2)-   UE User Equipment; a terminal for a wireless network-   eNB eNodeB; evolved Node B; a base station for a wireless network    (LTE)-   RRC Radio Resource Control-   QPSK Quadrature Phase Shift Keying, a modulation scheme-   16QAM 16 point QAM-   32QAM 32 point QAM-   64QAM 64 point QAM-   256QAM 256 point QAM-   SINR/SNR Signal-to-Interference and Noise Ratio; Signal-to-Noise    Ratio-   TBS Transfer Block Size-   TM Transmission Mode-   TM10 Transmission Mode 10; according to LTE-   TM1-9 Transmission Modes 1-9; according to LTE-   LTE Long Term Evolution; a wireless communication standard-   E-Utran Evolved UMTS terrestrial radio network access network; RAT    according to LTE-   RAT Radio Access Technology

FIG. 1 schematically shows a terminal or user equipment 10, which may bea node of a wireless communication network, in closer detail. Userequipment 10 comprises control circuitry 20, which may comprise acontroller connected to a memory. A reception unit or device and/orevaluation unit or device and/or reading or accessing unit or deviceand/or configuration device or unit may be implemented in the controlcircuitry 20, in particular as unit in the controller. The userequipment also comprises radio circuitry 22 providing receiving andtransmitting or transceiving functionality, the radio circuitry 22connected or connectable to the control circuitry. An antenna circuitry24 of the user equipment 10 is connected or connectable to the radiocircuitry 22 to collect or send and/or amplify signals. Radio circuitry22 and the control circuitry 20 controlling it are configured forwireless communication, in particular utilizing E-UTRAN/LTE as describedherein. In particular, they are arranged for receiving a controlmessage, e.g. a RRC message, and to read from one or more tablesdepending on table indication parameters as described herein, inparticular in reference to tables 4 to 8.

FIG. 2 schematically shows a base station 100, which in particular maybe an eNodeB. Base station 100 comprises control circuitry 120, whichmay comprise a controller connected to a memory. A configuring unitand/or a determination unit may be comprised in the control circuitry,the latter in particular if the base station is configured as acoordinating node. The control circuitry is connected to control radiocircuitry 122 of the base station 100, which provides receiver andtransmitter and/or transceiver functionality. It may be considered thatcontrol circuitry 120 comprises one or more of the devices or unitsdescribed herein. An antenna circuitry 124 may be connected orconnectable to radio circuitry 122 to provide good signal reception ortransmittance and/or amplification.

FIGS. 3 and 4 show different example methods and unit configurations. InS8, a control message determination unit of a base station may determinea control message, in particular one or more table indication parametersto be utilized, which may be performed based on channel qualityinformation and/or operative conditions like transmission or receptioncharacteristics. In S10, a transmitting unit of the base station maytransmit the control message, in particular to a user equipment orterminal. In S20, the terminal or a reception unit of the terminal, mayreceive the control message. In S22, an evaluation unit may evaluate thecontrol message, in particular determine and/or extract one or moretable indication parameters. In S24, one or more tables of one or moresets of tables may be accessed and or read, in particular by a readingunit of the terminal, based on the table indication parameters. Inparticular, the terminal may choose one table of each set of alternativetables to read from based on the one or more table indicationparameters, which refer to a set of alternative tables each. In S26, theterminal or a configuration unit of the terminal performs modulationconfiguration based on information retrieved by accessing the one ormore tables in S24.

It should be noted that generally, the devices or units of a basestation or user equipment discussed herein may be implemented asmodules, in particular as software modules or at least partly assoftware modules. Functionality of more than one module may beimplemented in a common module or module arrangement.

Generally, a set of alternative tables may comprise two or more tables,from which one may be chosen, e.g. for reading. This choice may beexclusive, so that for a given read access to a set of alternativetables only one table is chosen to be read from. Configuring a table, inparticular from a set of alternative tables, may be considered to bechoosing the table and/or selecting the table, e.g. for reading.

A set of alternative tables for CQI and/or CSI may comprise a set ofalternative tables pertaining to measurement sets to be used, inparticular pertaining to CQI/CSI parameters. It may be considered thatmore than one measurement set may be used and/or configured. Ameasurement set may e.g. define the frequency for and/or timing ofand/or type of measurements and/or related reports to be made (inparticular by a terminal and/or UE), and/or transmission format/s forreports on measurements, and/or modulation and/or coding to be used. Acorresponding table may provide indications and/or values for such ameasurement set, in particular a set indexed alternatives.

Generally, which table to be chosen from a set of alternative tables maybe dependent on further conditions, in particular cell conditions and/ortransmission mode and/or transmission format, e.g. DCI (Downlink ControlInformation) format and/or RNTI (Radio Network Temporary Identifier, anidentifier for a terminal/UE in a network) and/or channel conditions,e.g. search spaces on an (E)PDCCH ((Enhanced) Physical Downlink ControlChannel).

Operating with a table from a set of alternative tables may implychoosing this table and/or reading from this table. Operating with aspecific MCS table may refer to choosing a modulation configuration fromthis table and/or reading a modulation configuration from this table,and/or performing modulation and/or modulating transmission signalsbased on this table.

A modulation and/or modulation configuration and/or MCS may refer toand/or indicate a modulation scheme and/or modulation parameters, e.g.bits/symbol and/or bit transfer rate and/or whether to use QAM or norand/or which QAM to use, e.g. 16QAM, 32QAM, 64QAM, 128QAM and/or 256QAM,in particular the latter. A modulation and/or modulation configurationmay additionally pertain to a coding to be used, e.g. for errordetection and/or error correction. A table pertaining to modulationand/or MCS may generally indicate settings and/or values and/orparameters for a plurality of such modulations and/or modulationconfigurations and/or MCS (schemes), one of which may be chosen byreading from the table, e.g. based on an index.

Performing modulation configuration, e.g. based on a table, may compriseconfiguring for modulation based on values read from the table and/orsetting modulation parameters based on the table and/or based on valuesread from the table. It may in particular comprise choosing and/orreading a modulation and/or modulation setting and/or parameters fromthe table and/or from values in the table. Performing modulation maycomprise modulation configuration and/or transmitting data and/orsignals based on and/or utilizing the modulation configuration schemeconfigured.

A method for a device (like a terminal or base station) may generally bea method for operating the device and/or a method performed by thedevice (and/or individual components and/or units of the device).

What is claimed is:
 1. A terminal for a wireless network, the terminalbeing configured to: receive a control message; read from one of a setof alternative tables based on the control message; operate with a256QAM MCS table, if one of a first and second measurement sets isconfigured with a 256QAM CQI table; and perform modulation configurationbased on information read from the table.
 2. The terminal according toclaim 1, wherein the set of alternative tables refers to differentmodulation schemes.
 3. The terminal according to claim 2, wherein thecontrol message comprises a parameter configuring a MCS table for bothof two measurement subframe sets and at the same time configuring a CQItable for one of the measurement subframe sets.
 4. The terminalaccording to claim 1, wherein the control message comprises a parameterconfiguring a MCS table for both of two measurement subframe sets and atthe same time configuring a CQI table for one of the measurementsubframe sets.
 5. A method for a terminal for a wireless network, themethod comprising: receiving a control message; reading from one of aset of alternative tables based on the control message; operating with a256QAM MCS table, if one of a first and second measurement sets isconfigured with a 256QAM CQI table and performing modulationconfiguration based on information read from the table.
 6. The methodaccording to claim 5, wherein the set of alternative tables refers todifferent modulation schemes.
 7. The method according to claim 6,wherein the control message comprises a parameter configuring a MCStable for both of two measurement subframe sets and at the same timeconfiguring a CQI table for one of the measurement subframe sets.
 8. Themethod according to claim 5, wherein the control message comprises aparameter configuring a MCS table for both of two measurement subframesets and at the same time configuring a CQI table for one of themeasurement subframe sets.
 9. A base station for a wireless network, thebase station being configured to: determine a control message; transmitthe control message to a terminal; and the control message comprisinginformation indicating a table of a set of alternative tables to beused, and the control message being adapted for configuring the terminalfor operating with a 256QAM MCS table, if one of a first and secondmeasurement sets is configured with a 256QAM CQI table.
 10. The basestation according to claim 9, wherein the set of alternative tablesrefers to different modulation schemes.
 11. The base station accordingto claim 10, wherein the control message comprises a parameterconfiguring a MCS table for both of two measurement subframe sets and atthe same time configuring a CQI table for one of the measurementsubframe sets.
 12. The base station according to claim 9, wherein thecontrol message comprises a parameter configuring a MCS table for bothof two measurement subframe sets and at the same time configuring a CQItable for one of the measurement subframe sets.